When changing channel selection, the user should observe the following guidelines to ensure that the correct channel is selected:
In Single Conversion mode: The channel should be selected before starting the conversion. The channel selection may be changed one ADC clock cycle after writing '1' to the STCONV bit.
In Free Running mode: The channel should be select before starting the first conversion. The channel selection may be changed one ADC clock cycle after writing '1' to the STCONV bit. Since the next conversion has already started automatically, the next result will reflect the previous channel selection. Subsequent conversions will reflect the new channel selection.
After switching the input channel the ADC requires a settling time, please refer to the electrical characteristics section for details.